Volkswagen faces a new series of claims in Irish courts over its diesel emissions cheating scandal.

It has been put on notice by three motorists, who are looking for compensation because of the alleged impact devices to fix the issue has had on their cars.

They are being represented by the same Ballyhaunis, Co Mayo firm, O'Dwyer solicitors, whose case against Volkswagen on behalf of a Roscommon nurse attracted attention worldwide. She is asking that the car giant discloses the original expert opinion and technical evidence that it used to develop the so-called 'fix'.

Now a new line of claim has been opened on behalf of three other motorists. It is alleged that since getting a letter from Volkswagen admitting the 'cheat' and outlining the steps it planned to remedy it, the car owners have not had a "proper explanation" of what was installed in their vehicles.

Nor, it is claimed, have they been told how it has affected their vehicles' performance, and legality. They claimed the intended "fix", which is designed to lower NOx discharges, will "directly result in increased CO2 emissions" and could mean they have underpaid road tax and possibly VRT through no fault of their own.

Government departments will be accused of accepting the automaker's word that their cars were meeting regulations and of failing to take independent analysis to allay owners' fears to the contrary.